I have in my possession a S&W Model 19-5 pistol. The odd part is that is has a square, heavy barrel with "E. HOUSE 5-83" stamped on the bottom of it. The cylinder has been chamfered for speed loads and the trigger is is about 2 lbs. SA and 4-5 lbs double action. I was wondering if anyone could help me identify what's up with the square barrel with the E. HOUSE stamp. Was he some sort of custom pistol smith or was this an add-on one could purchase from a catalog?